You dear sir should have known better then to approach the first dog with your hand coming towards his head. YOU should be the one to apologize to Barney - it was not his fault - it was YOURS! Maybe the next time you go to approach a dog you will A) ASK FIRST and B) Offer your hand so they can sniff it, THEN proceed to pet them UNDER the chin.
You deserved what you got - and the White House does not owe you an apology for your own incompetence.
No love, and NO respect,
-Me
(For those who haven't seen the story - here it is:
http://www.itv.com/News/Articles/Bushs-Barney-bites-a-reporter-432605739.html)